According to the findings of the International Society of Nephrology, less than 5% of the global public understands the location and function of the kidneys. In contrast, 500 million people worldwide are suffering from different degrees of chronic kidney disease. We all know that the kidney is a very important organ in the human body, so what is the role of the specific kidney in the human body? A person has two kidneys, which are in the back where the rib cage meets the spine. The kidneys are a very important organ with several basic functions: First, the kidneys can remove excess water from the body, and all the water we drink must be excreted from the urine. Second, the human body produces a lot of metabolic waste every day, these wastes are also eliminated through the kidneys, the kidneys to remove water to remove waste is its most basic function. In the process of removing water and waste, the kidney is an important organ for adjusting blood pressure and maintaining the water-electrolyte balance and acid-base balance through the kidney. Thirdly, it is easy to overlook that the kidney is a very important endocrine organ that can produce some hormones called erythropoietin, which makes our red blood cells form. At the same time, the kidney also produces substances that regulate blood pressure. In addition, the kidney also plays an important role in the metabolism of insulin, by adjusting insulin to adjust the body’s blood sugar level. In the early stage of the disease, the kidney has a strong compensatory capacity and the patient can have no symptoms, but if the kidney function is damaged to a certain degree, for example, more than half of normal, then it will show a variety of symptoms at this time.